From e65d4187eebf13118323758fef390b12ac8161c6 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 29 Jan 2026 10:46:14 +0800
Subject: [PATCH] =?UTF-8?q?=E8=BF=9B=E9=98=B6day01-=E5=AD=97=E7=AC=A6?=
 =?UTF-8?q?=E4=B8=B2=E4=B8=8E=E5=9F=BA=E6=9C=AC=E7=B1=BB=E5=9E=8B=E7=9A=84?=
 =?UTF-8?q?=E8=BD=AC=E6=8D=A2?=
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---
 .../src/com/inmind/wrap08/Demo26.java         | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 javaSE-day01/src/com/inmind/wrap08/Demo26.java

diff --git a/javaSE-day01/src/com/inmind/wrap08/Demo26.java b/javaSE-day01/src/com/inmind/wrap08/Demo26.java
new file mode 100644
index 0000000..4b9fe1d
--- /dev/null
+++ b/javaSE-day01/src/com/inmind/wrap08/Demo26.java
@@ -0,0 +1,55 @@
+package com.inmind.wrap08;
+/*
+    在java中定义了8个与基本类型一一对应的包装类
+    byte        Byte
+    short       Short
+    int         Integer
+    long        Long
+    float       Float
+    double      Double
+    char        Character
+    boolean     Boolean
+
+    包装类是一个类,封装了很多的功能,提供更多的功能去操作,基本类型进行计算
+
+    在jdk1.5版本之后,出现自动拆装箱
+    拆箱:包装类--->基本类型
+    装箱:基本类型--->包装类
+    ------------------------------------------------
+    字符串与基本类型的转换
+
+    基本类型---->字符串
+        +""即可
+    字符串----->基本类型
+        包装类名.parseXXX(字符串);
+ */
+public class Demo26 {
+    public static void main(String[] args) {
+        int i = 10;
+        Integer i1 = i;//装箱
+        Integer i2 = new Integer(10);
+        System.out.println(i2);
+
+//        int sum = 10+i2;//拆箱
+        int sum = 10 + i2.intValue();
+        System.out.println(sum);
+        System.out.println("--------------------------------------");
+        //基本类型转为字符串
+        int a = 10;
+        String str1 = a + "";
+
+        //字符串转为对应的基本类型
+        String str2 = "true";
+        boolean b1 = Boolean.parseBoolean(str2);
+        System.out.println(b1);
+
+        String str3 = "100";
+        int i3 = Integer.parseInt(str3);
+        System.out.println(i3);
+
+        String str4 = "2.0";
+        double v = Double.parseDouble(str4);
+        System.out.println(v);
+
+    }
+}